Device for removing and fastening the rivets securing the knives of reaping and like machines.



S.CROMPTON. DEVICE FOR REMOVING AND FASTENING THE RIVETS SECURING THEKNIVES OF REAPING AND LIKE MACHINES.

' APPLICATION FILED 050.1. I911.

1,299,134. Patented Apr. 1,1919.

2 SHEETS-SHEET I.

S. CROMPTON. DEVICE FOR REMOVING AND FASTENING THE RIVETS SECURING THEKNIVES 0F REAPING AND LIKE MACHINES.

APPLICATION FILED DEC. 1, I91].

Patented Apr. 1, 1919.

2 SHEETS'-SHEET 2.

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SAMUEL OROMPTON, OF

BELFAST, IRELAND, ASSIGNOR OF ONE-HALF T0 ARTHUR GREGG, OF BELFAST,IRELAND.

DEVICE FOR REMOVDTG ANDFASTENING THE RIVETS SECURING THE KNIVES 0FREAPIN'G AND LIKE MACHINES,

To all whom it may concern:

Be it known that I, SAMUEL GROMPTON, of Belfast, Ireland, a subject ofthe King of Great Britain and Ireland, have invented a certain new anduseful Device for Removing and Fastening the Rivets Securing the Knivesof Reaping and like Machines, of which the following is a specification.

This invention relates to the cutting back bar or knife carrier is heldso that the knives lie on top of said fence with the knife bar againstits back edge. Behind said fence I provide a tool carrying slide whichis suitably supported and adapted to be reciprocated by suitable meanstoward and away from the fence, so that, by pressing the tool forwardthe knife can be forced off the bar by shearing the rivets fastening itthereto. Preferably, the means for reciproeating the slidable barconsists of a crank and operating hand lever, the crank, which issupported in suitable bearings, engaging a slot, or opening, in theslide so that, when the crank is oscillated the bar will bereciprocated. At the front of the slide I provide the tool for removingthe knives from the knife bar, which tool is removable and capable ofbeing replaced by another tool for securing the knives to the knife bar.For removing the knives the tool is so made that it fits over the topand along the back edge of a knife, or tooth, behind a rivet, but is notdeep enough to reach the top edge of the knife carrying bar, so that,when the tool is forced forward by the slidable bar and against the backedge of the knife, enough pressure will be exerted to cause the knife tobe broken off the bar at the rivet. This operation is repeated at eachrivet until the knife or tooth is free. The portions of the rivetsremaining in the back bar can be readily re moved by a punch secured tothe slide bar Specification of Letters Patent.

' Patented Apr. 1, i919.

Application filed Becember 7, 1917. Serial No. 206,009.

rivets, or for securing more than one rivet in position at a time.

In order that the invention may be clearly understood I have hereuntoappended explanatory drawings, whereon,

Figure 1 is a side elevation of the device, partlyin section, andshowing the back bar and tool in position for the removal of the knife.

.Fig. 2 is a plan view corresponding to Fig.

Fig. 3 is a front elevation.

Figs. 4 and 5 are, respectively, elevation and plan views of the kniferemoving tool.

Figs. 6, 7, and 8 are respectively, sectional, plan, and end views, of arivet removing tool.

Fig. 9 is a section of part of the device showing a riveting tool readyto be pressed forward to form a snap head on a rivet. This figure alsoshows an elevation of the knife 70 withv its rivets.

In the example shown 'on the drawings the device has a projectingsupport or fence bar a secured to, or forminga part of, the sole plate 6on which a movable tool carrying slide 0 is supported and adapted to bereciprocated in a path at right angles to the aforesaid fence bar. Theactuation of the tool carrying slide 0 is obtained by means of a crankoZ supported in bearings b on the sole plate 6. This crank engagesbetween upstanding ears 0 on the slide bar 0 and is connected by a leverf, and link 9, with an operating hand lever h, fulcrumed at id. Theslide a is shown in mid position. At the front end of the slide bar 0the knife removing tool 2' is adjustably secured. This tool is shown inlarger detail at Figs. 4 and 5 and it will be seen it is so made that itfits partly over the top and partly down the back edge of a knife is,lying on the fence bar a with its back bar 70 against the bar a. Thepart i of the tool is not deep enough to reach the top edge of the bar70 When the tool is forced forward, by the forward movement of the slide0 operated by hand lever h, suflicient pressure is exerted on the backedge of the knife to cause it to be freed from the bar 70 by breakingaway, or shearing, the rivet at the part 00. This operation is repeatedat each rivet until the knife is free. The portions of the rivetsremaining in the bar 70 can then be forced out by means of the punchingtool Z, shown in Figs. 6, 7 and 8, which replaces the tool 71 for thispurpose. Similarly by fitting a holding block m- (Fig. 9) on the fencebar a and securing a riveting tool a at the end of the slide 0 newknives 70 can be riveted on to the knife bar 70 which is arrangedvertically as shown in Fig. 9.

Although I have shown only one tool on the slide bar 0, I may, asalready stated provide a plurality of tools on one slide bar for thepurpose of expediting the work of removing the knives from, or securingthem to, the knife bars. V

The device may be made portable and be capable of being bolted orclamped to a bench or table.

The device hereinbefore describedwill be Copies of this patent may beobtained for five cents each, by addressing the Commissioner of Patents,

found of great service in the repair of farming machinery andimplements.

Having now fully descrlbed my lnvention what I claim and desire tosecure by Letters Patent is I 1. A device for removing the blunt knivesfrom the knife bars of reaping and like machines comprising a sole platewith upwardly projecting support for the knife bar thereon, a slide, acrank for reciprocating the slide, means for operatnig'the crank, and atool secured to the slide and reciprocated thereby to operate on theknife to rev move it from the bar.

A device for removing the blunt knives from the knife bars of reapingandlike machines comprising a sole plate, bearings on the sole plate, acrank shaft carried in said bearings a slide, rs on the slide engagingthe crank of said crank shaft, a tool on the slide, and lever and linkmeans for rocking the crank shaft and reciprocating the slide to bringthe tool into operative engagement with the knife to remove the latterfrom the Washington, D. C.

